/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/UsdWrappers/UsdStage.h
Saves a flattened copy of the stage to the given path (e.g. "C:/Folder/FlattenedStage.usda"). Will use the corresponding file writer depending on FilePath extension. Will not alter the current stage.
bool Export ( const TCHAR * FileName, bool bAddSourceFileComment, const [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [FString](API\Runtime\Core\Containers\FString) > & FileFormatArguments ) const